Ranking of Iowa Counties By Percentage of Population that are Black or African American Alone in 2018
Updated on June 18, 2025.
Based on the US Census Vintage data estimates, in 2018, among all Iowa counties, Black Hawk County had the highest percentage of its population who identified their race as Black or African American Alone (9.79%), followed by Scott County (7.89%), and Johnson County (7.7%).
The chart below shows the top 10 counties, and the table below shows the ranking of all Iowa counties.
You can see similar ranking information for other racial and ethnicity groups in the United States.
You can also see similar information for other states, and also the ranking of all counties in the United States.
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Related Topics: Iowa Census Vintage Data Topic List.
Data Source: US Census Bureau (Vintage).
See this for other years:
Ranking of Iowa Counties By Percentage of Pop. that are
Black or African American Alone in 2018
Items per page:
25
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| Rank | County | % of County Population |
|---|---|---|
| 1 | Black Hawk County | 9.79 |
| 2 | Scott County | 7.89 |
| 3 | Johnson County | 7.7 |
| 4 | Polk County | 7.17 |
| 5 | Des Moines County | 6.12 |
| 6 | Linn County | 6.07 |
| 7 | Webster County | 4.63 |
| 8 | Woodbury County | 4 |
| 9 | Wapello County | 3.88 |
| 10 | Crawford County | 3.85 |
| 11 | Dubuque County | 3.57 |
| 12 | Buena Vista County | 3.49 |
| 13 | Lee County | 3.12 |
| 14 | Story County | 2.93 |
| 15 | Clinton County | 2.89 |
| 15 | Muscatine County | 2.89 |
| 16 | Page County | 2.81 |
| 17 | Henry County | 2.73 |
| 18 | Floyd County | 2.69 |
| 19 | Jones County | 2.55 |
| 20 | Dallas County | 2.4 |
| 20 | Jefferson County | 2.4 |
| 21 | Jasper County | 2.33 |
| 22 | Calhoun County | 2.32 |
| 23 | Marshall County | 2.31 |
| 24 | Decatur County | 1.96 |
| 25 | Mahaska County | 1.94 |
| 26 | Cerro Gordo County | 1.93 |
| 27 | Allamakee County | 1.81 |
| 28 | Palo Alto County | 1.8 |
| 29 | Pottawattamie County | 1.76 |
| 30 | Winnebago County | 1.72 |
| 31 | Hardin County | 1.59 |
| 32 | Poweshiek County | 1.55 |
| 33 | Fayette County | 1.48 |
| 34 | Emmet County | 1.45 |
| 35 | Union County | 1.44 |
| 36 | Clarke County | 1.29 |
| 37 | Bremer County | 1.27 |
| 38 | Carroll County | 1.26 |
| 39 | O'Brien County | 1.24 |
| 39 | Washington County | 1.24 |
| 40 | Boone County | 1.2 |
| 41 | Franklin County | 1.17 |
| 42 | Cherokee County | 1.14 |
| 42 | Louisa County | 1.14 |
| 43 | Kossuth County | 1.13 |
| 44 | Hamilton County | 1.09 |
| 45 | Shelby County | 1.06 |
| 46 | Wright County | 1 |
| 47 | Hancock County | 0.98 |
| 48 | Tama County | 0.96 |
| 49 | Worth County | 0.93 |
| 50 | Plymouth County | 0.92 |
| 50 | Pocahontas County | 0.92 |
| 51 | Clayton County | 0.91 |
| 51 | Delaware County | 0.91 |
| 52 | Warren County | 0.89 |
| 53 | Marion County | 0.88 |
| 54 | Chickasaw County | 0.82 |
| 54 | Clay County | 0.82 |
| 54 | Sioux County | 0.82 |
| 54 | Winneshiek County | 0.82 |
| 55 | Appanoose County | 0.79 |
| 55 | Ringgold County | 0.79 |
| 56 | Fremont County | 0.78 |
| 56 | Monroe County | 0.78 |
| 57 | Osceola County | 0.73 |
| 58 | Humboldt County | 0.69 |
| 58 | Mills County | 0.69 |
| 59 | Jackson County | 0.67 |
| 60 | Benton County | 0.66 |
| 60 | Madison County | 0.66 |
| 61 | Cedar County | 0.65 |
| 62 | Iowa County | 0.63 |
| 62 | Mitchell County | 0.63 |
| 63 | Howard County | 0.61 |
| 64 | Keokuk County | 0.6 |
| 65 | Monona County | 0.59 |
| 66 | Guthrie County | 0.58 |
| 66 | Taylor County | 0.58 |
| 67 | Buchanan County | 0.57 |
| 68 | Wayne County | 0.55 |
| 69 | Greene County | 0.52 |
| 70 | Audubon County | 0.51 |
| 70 | Grundy County | 0.51 |
| 71 | Cass County | 0.48 |
| 72 | Adair County | 0.47 |
| 72 | Lyon County | 0.47 |
| 72 | Montgomery County | 0.47 |
| 73 | Dickinson County | 0.46 |
| 74 | Harrison County | 0.44 |
| 75 | Ida County | 0.43 |
| 75 | Lucas County | 0.43 |
| 76 | Adams County | 0.36 |
| 77 | Van Buren County | 0.31 |
| 78 | Butler County | 0.3 |
| 78 | Sac County | 0.3 |
| 79 | Davis County | 0.19 |